Open source is GREAT, but developers must remember
that the cost (time and $) to move from one version to another
is very low....
Most of the Gnome developers probably are not Fedora users anyway,
and why should they care which distro people use ? Similarly from a
commercial perspective 'what's the business case ?'
As to distro switching - yes it isn't hard, and the desktop switching
option in Fedora is even easier.
yum groupinstall "XFCE"
set your desktop at gdm
End of problem
Alan